Originally Posted by awarnes
When the previous owner of my 87 Allegro had the brakes done he didn't do the brake lines. Mine froze up and locked up. The issue was the brake lines. They had to all be redone. Do it all and your problem will go away. I didn't have an issue last year in 3000 miles of driving
He is right. The problem is the rubber hose at the caliper. The middle section has a clamp that attaches the hose to the frame. As the hose ages it swells and the clamp will not let it expand out. The hose swells shut and stops the flow of fluid. When you put on brakes the power steering pump pressure applies the brakes, but when you let off the brakes the hose holds the pressure on.
I have changed dozens of these. This is a common problem with Chevy.